Pioneer CS-R700 ()
A 3-way bass reflex bookshelf loudspeaker system from Pioneer's R Series. It has a 12" FB woofer and two horn drivers for the mid and high frequencies.
Overview
The Pioneer CS-R700 is a 3-way, 3-speaker bass reflex bookshelf loudspeaker system. It belonged to Pioneer's R Series and moved away from furniture-style cabinets toward dedicated high-fidelity enclosures. It was not positioned as a high-end model, but it put its effort into bass reproduction, using new materials and design. The international CS-R700 is the same as the Japanese domestic model CS-R70.
Specifications
| Type | bass-reflex |
| Impedance | 8 Ω |
| Output sound pressure level / Sensitivity | 91 dB / W / m |
| Max Input / Maximum input power | 75W |
| Crossover frequency | 700 Hz, 14 kHz |
| External dimensions | 380 mm (W) x 660 mm (H) x 346 mm (D) |
| Weight | 23kg |
| Playback frequency band / Frequency range | 30 Hz to 20 kHz |
| Bass driver | 30 cm (12") FB cone woofer |
| Mid/high driver | horn |
| Super-high driver | multi-cellular horn |
Design
The woofer is a 30 cm cone type. Its FB (Free Beating) diaphragm is made of treated pulp with a special coating, which keeps it rigid and light. The surround is foamed polyurethane. The voice coil is long and wound edgewise with copper ribbon wire on an aluminum bobbin. The magnet is a 140 φ ferrite, and a pure copper shielding cap sits over the center pole. The woofer network includes an impedance compensation (CR) circuit. The mid-range is a horn type equivalent to unit PM-40, with sound-absorbing material in the yoke and a 4 mm thick die-cast horn with unique curve and fin improvements. The high range uses a multi-cellular horn tweeter. The enclosure is bass reflex, with a sound-absorbing partition in the center. The standard grill is brown. Blue (PP-70BE) and red (PP-70RD) grills were optional.
Context
The CS-R700 marked Pioneer's move in 1972 from furniture-style speaker cabinets to dedicated high-fidelity enclosures. The company was focused at the time on refining bass reproduction through new materials and construction techniques. It was not considered a flagship model in the lineup.
Collectibility
Replacement grills came as accessory pairs, in blue (PP-70BE) and red (PP-70RD).
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